Oh goodie. This one encrypts the MFT.
"When you see the Blue Screen of Death, all your data is not yet corrupted, since Petya hasn’t started to encrypt the Master File Table. So if you see that your computer shows you a BSOD, reboots and starts the Check Disk — immediately shut it down. At this point you still can remove your hard drive, connect it to another computer (but don’t use it as a boot device!) and recover your files."
https://usblog.kaspersky.com/petya-ransomware/6941/
"When you see the Blue Screen of Death, all your data is not yet corrupted, since Petya hasn’t started to encrypt the Master File Table. So if you see that your computer shows you a BSOD, reboots and starts the Check Disk — immediately shut it down. At this point you still can remove your hard drive, connect it to another computer (but don’t use it as a boot device!) and recover your files."
https://usblog.kaspersky.com/petya-ransomware/6941/